To prevent cave-ins, sloped or tiered walls may be used for trenches less than _____.
a. 10' deep
b. 15' deep
c. 20' deep
d. 25' deep
Answer: C
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What is the gear ratio of this gear set (small gear driving)?
A) 3:1
B) 1.5:1
C) 2:1
D) Cannot calculate
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____________________ tools regularly is a good way to keep them working safely and effectively
Fill in the blank(s) with correct word
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Cats have much less variation in their body size and weight than dogs.
Answer the following statement true (T) or false (F)
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Conventional crop products are safer than GM crop products on the market
Indicate whether the statement is true or false
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